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EGM2008是近来由NGA(US National Geospatial-IntelligenceAgency)释放的全球超高阶地球重力场模型,该模型的阶次完全至2 159 (另外球谐系数的阶扩展至2 190,次为2 159),相当于模型的空间分辨率约为5′(约9 km)。该模型采用了GRACE卫星跟踪数据( ITG-GRACE03S位系数信息以及相应的协方差信息)、卫星测高数据和地面重力数据等,该模型无论在精度还是在分辨率方面均取得了巨大进步,采用该模型以及GPS/水准数据有望获得更高精度的区域似大地水准面。
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1
APPROVED FOR PUBLIC RELEASE 07-224
UNCLASSIFIED
An Earth
Gravitational Model
to Degree 2160:
EGM2008
APPROVED FOR PUBLIC RELEASE 07-224
Nikolaos K. Pavlis, Simon A. Holmes,
Steve C. Kenyon, and John K. Factor
EGU General Assembly 2008
Vienna, Austria, April 13-18, 2008
Nikolaos.K.Pavlis@nga.mil
UNCLASSIFIED
2
APPROVED FOR PUBLIC RELEASE 07-224
UNCLASSIFIED
Progress since the IUGG 2007 Meeting in
Perugia
• Re-iteration of 5′×5′ area-mean terrestrial g predictions using
PGM2007B as our reference model to 2160 was completed.
• Ocean-wide altimetry-derived g were estimated independently by
DNSC and SIO/NOAA, using PGM2007B and its associated Dynamic
Ocean Topography as reference models.
• Feedback from several members of the IAG/IGFS Joint Working
Group on the performance of PGM2007A was received, evaluated,
and corrective actions were taken where necessary (and possible).
• A new global 5′×5′ g data set was compiled by January 8, 2008.
Our main focus:
• Calibrate our error estimates and perform the final iteration of the
model’s development, to produce EGM2008.
3
APPROVED FOR PUBLIC RELEASE 07-224
UNCLASSIFIED
55 g Data Availability (v010808)
12.0% of Land
42.9% of Land
45.1% of Land
4
APPROVED FOR PUBLIC RELEASE 07-224
UNCLASSIFIED
55 g Data Sources (v010808)
5
APPROVED FOR PUBLIC RELEASE 07-224
UNCLASSIFIED
55 g Data Standard Deviations
(v010808)
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资源评论
- ssk20192020-04-25内容详细,很有用处!
- sd12121213a2018-01-02借鉴一下,学到了一些知识。
- 伟宏2020-01-07不是软件,一个PPT介绍?
- first2032013-05-29以为是代码呢,可惜是个程序,不过也可以借鉴下了··
- csy8023csy2019-12-12学习一下!!
maodun_7
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